Question

1 Which is the method that cannot be used to remove permanent hardness of water?
a) Distillation.
b) Boiling.
c) Adding caustic soda.
d) Adding sodium carbonate.

Answer 1

Hi mate here is your answer.❤

permanent hardness cannot be removed by boiling.

Boiling is helpful to remove temporary hardness of water.

Hope it may help you.....❤

Answer 2

Hi friend here is your answer
I think the answer is boiling